Hair-clipper.



F. M. NOONAN.

HAIR CLIPPER.

APPLICATION FILED AUG-5. [91s.

LSUQflSG.

Patented May 6, 1919.

M V I Zi aY/WW/ g (9720 I rzfimwwz Mam/w gizgys FRANK M. NOONAN, 0FBOSTON, MASSACHUSETTS.

HAIR-CLIPPER.

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Specification of Letters Patent.

Patented May 6, 1919.

Application filed August 5, 1918. Serial No. 248,296.

To all whom it may concern:

Be it known that I, FRANK M. NOONAN, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented new and useful Improvements in Hair-Clippers, of which thefollowing is a specification.

This invention relates to a hair clipper which includes the usualserrated base or lower cutter and a serrated upper cutter in slidingcontact with the lower cutter, means being provided for reciprocatingthe upper cutter.

The invention is embodied in the improved cutter reciprocating meanshereinafter described and claimed, the object of the invention being toenable the upper cutter to be reciprocated by power transmitted prefer-.ablv through a flexible driving shaft.

Of the accompanying drawings forming a part of this specification,

Figure-l is a top plan view of a hair clipper embodying the invention.

Fig. 2 is a slde view of the same.

Fig. 3 is a section on line 33 of Fig. 1.

Fig. 4 is a view similar to a portion of Fig. 1, the member which holdsdown the upper cutter being removed, and the shank hereinafter referredto being shown in section.

Fig. 5 is a perspective view of the flexible lever hereinafterdescribed, the members of said lever being disconnected.

Fi 6 is a perspective view of the journaled portion of the driving shaftshown by Fig. 3.

Fig. 7 is a'fragmentary" sectional view showing a modification.

The same reference characters indicate the same parts in all of thefigures.

In the drawings, 12 represents the serrated base or lower cutter,havin'g a straight row of teeth, and 13 the'serrated upper cutter whichalso has a straight row of teeth and is in sliding contact vwith thelower cutter and is reciprocated by the means hereinafter described. Theupper cutter is guided in a rectilinear path by means embodied in studs12 fixed to the lower cutter, and slots 13 in the upper cutter.

To the rear portion of the lower cutter 12 1s attached the usualupstanding stud 14 which is threaded at its upper end to engage theusual clamping nut 15, which confines the holding-down member or cover16, whereby the upper cutter is held in contact with the lower cutter,the usual annular spring 17 being interposed between the nut 15 andmember 16.

18 represents a handle fixed to the lower cutter 12, preferably by meansof a shank 19 rigidly attached as by screws 20 to the lower cutter andoffset therefrom, the shank being provided with a tubular terminalportion 19 internally threaded to form'a coupling part engageable with acomplemental coupling part 1 8 on the handle 18. The

shank 19 is inclined relatively to the plane of the lower cutter, andholds the handle 18 similarly inclined.

The handle 18 is longitudinally bored to form a bearing in which isournaled a driving shaft 21. Said shaft may be rotated by any suitablemeans, and is preferably rotated by a flexible drivino' shaft extension22, of well known constructlon, the shaft 21 being provided at its outerend with means embodied as here shown. in a socket 23 and a set screw24, wherebyit may be coupled to the flexible extension 22.

The upper cutter 13 is reciprocated by power transmitted from the rotarydriving shaft 21 through a flexible or jointed twoarmed leverconstructed as next described. Said lever includes an inner arm 25formed to enter a slot 26 in the upper cutter 13, and thus looselyengage said cutter to reciprocate it, the arm 25 moving in an arcuatepath, while the upper cutter moves, as above stated, in a rectilinearpath. The arm 25 is fixed to a hub 26, which is mounted to oscillate onthe smooth lower portion of the stud 14.

vand shortened, and oscillates the lever arm 25 in the directionsrequired to reciprocate the upper cutter 13.

In the embodiment of the invention shown by Figs. 3, 4, 5 and 6, theshaft 21 is provided at its inner end with a concave socket 33 whichconstitutes a ball-and-socket joint member and receives a rounded, orsubstantially spherical head 34 formed on the inner end of the part 30of the telescopic lever arm, said head constituting a complementalballand-socket joint member.

To maintain the said joint members operatively interengaged, I interposebetween the sliding part 30 and portions of the part 27,

a helical spring 36-, which alternately elon-- gates the telescopic armand permits it to be shortened.

Fig. 7 illustrates a modification, in which the inner end of the shaft21 is provided with an' eccentric wrist-pin 37 having a rounded outerend portion constituting one of the ball-and-socket joint members andengaging the partly spherical socket 38 formed on the outer end of thelever part 30, the socket 38 constituting a complemental ball-and-socketjoint member and being closed upon the head of the wrist-pin 37, so thatit is not separable therefrom. The

spring 36 is, therefore, not required.

The telescopic arm and the ball-and-socket jointconnectmn between saidarm and the shaft 21 are adapted to transmit power from the shaft to thearm 25,- which reciprocates the upper cutter, without objectionablefrictional resistance.

'One edge portion of the handle 18 may be corrugated, as shown at 39 byFigs, 1 and 2, to engage the fingers of a 'hand grasping the handle, theopposite edge portion of the handle being provided with a projectingthumb rest 40; v

The holding-down member 16 is preferably provided with an arm 16*,seated onthe upper side of theshank portion 19. It is obvious that anyother suitable universal joint may be substituted for the universaljoint formed by the members 33 and 3%. or by the members 37 and 38.

I claim:

1. A hair clipper comprising a fixed serrated lower cutter provided witha straight row of teeth and with an upwardly projecting stud, a movableserrated upper cutter in sliding contact with the lower cutter andprovided with a straight row of teeth, means for guiding the uppercutter in a rectilinear path, a flexible two-armed lever including aninner arm loosely engaged with the upper cutter and having a huboscillatable on said stud, and a two-part telescopic outer arm, one partof which is hinged. to said hub to oscillate on an axis substantially atright an les to the hub axis, the other part being sli able to vary thelength of the said outer lever arm, a handle fixed to the lower cutterand provided with a bearing, a driving shaft journaled in said bearing,and universal joint members, one mounted eccentrically on said shaft andthe other on the slidable part of the outer lever arm, meansbeingprovided for maintaining said'members operatively interengaged.

2. A hair clipper comprisin a fixed serrated lower cutter provided witha straight row of teeth and with an upwardly projecting stud, a movableserrated upper cutter in sliding contact with the lower cutter andprovided with a straight row of teeth, means for guiding the uppercutter in a rectilinear path, a flexible two-armed lever including aninner arm loosely engaged with the upper cutter and having a huboscillatable on said stud, and a two-part telescopic outer arm, one partof which is hinged to said hub to oscillate on an axis substantially atright angles to the hub axis, the other part being slidable to vary thelength of the said outer lever arm and provided with a rounded terminalconstituting a ball-and-socket joint member, a handle fixed to the lowercutter and provided with a bearing, and a driving shaft journaled insaid bearing and provided with an eccentric socket forming acomplemental ball-and soc'ket joint member receiving said roundedterminal, and a spring for maintaining the said terminal inengagementwith said socket.

3. A hair clipper comprising a fixed serrated lower cutter provided witha straight row of teeth andwith an upwardly projecting stud, {and withan offset tubular shank, the axis of which is inclined relatively to theplane of the lower cutter, said shank having a coupling part, a movableserrated upper cutter in sliding contact with the lower cutter andprovided with a straight row of teeth, means for guiding the uppercutter in a rectilinear path, a flexible twoarmed lever including aninner arm loosely engaged with the upper cutter and having a huoscillatable on said stud, and a twopart telescopic outer arm, one partof which is hinged to said hub to oscillate on an axis substantially atright angles to the hub axis, the other part being slidable to vary thelength of the said outer lever arm, a handle having a longitudinalbearing and'a complemental coupling part engaging the coupling part onthe shank, and held by the latter in- 5 clined relatively to the planeof the lower cutter, a driving shaft journaled in said bearing, anduniversal joint members, one

mounted eccentrically on said shaft and the other on the slidable partof the outer lever arm,'1neans being provided for maintaining 10 saidmembers operatively interengaged. In testimony whereof I have aflixed mysignature,

FRANK M. NOONAN.

